I have been with women from under 5 ft to just barely under 6 ft tall. I actually keep statistics on these things because I am weird.:p

Of the two "loosest" women I have known one was 5'2" and the other was 5'6". Of the three naturally "tightest" the very "tightest" was 5'2" and the other two were 5'7" and 5'10". The one who was under five feet was not even one of the five tightest. I have been with several women between 5'6" and 5'11" who had a hard time taking the entire length of my penis in any position and other women in the 5' to 5'6" range who couldn't get enough.

I don't have any idea about the depth issue, but in my own experience, with exceptions, women with thinner looking hips tend to be naturally tighter. I remember my first world class sex partner was 5'6" had thin looking hips and ws actually quite roomy inside on the natural tightness scale,but had incredible pelvic floor muscle strength and control which made her much more enjoyable than other partners who were naturally tighter, but knew less about how to work their muscles.

In the long run there is no substitute for good pelvic muscle tone for maximum sexual enjoyment of both partners.

Because there are so many who do not differentiate between the vagina (an internal organ) and the pudenda (external genitals. most commonly referring to the woman), let's separate the vulva from the vagina. The outer lips (vulva) tend to be larger in heavier women - not taller, heavier. The external appearance of a woman's genitals is affected by her weight but not by her height.

There has never been a relationship determined between the size of the woman (height or weight) and the size of the clitoris. The clitoris tends to be more accessible in fitter women and gets lost in the folds of obese women. Again, we are talking weight and not height.

The size of the vagina is irrelevant. If you measure at different stages of sexual arousal, you will get different measurements regardless of the size of the woman. In a non-aroused state it is usually 4-5 inches long (10 cm) and the sides may be touching. Call the diameter a half inch or one cm. As we become aroused, the vagina lengthens and dilates as a balloon does. It may reach seven inches (17 cm) regardless of the size of the woman and a few inches in diameter. It cannot be measured mechanically because anything you insert will change the shape of the vagina.

The vagina is amazingly elastic to accommodate the head of a baby at birth. It will accommodate any size penis and, in some cases, men will complain that they feel nothing. If the thrusting does not further stretch the vagina, it is possible that the head of the penis is not getting "stroked." Correcting this is a simple case of changing angles.

The sensation of tightness that men seem to think so important does not come from the vagina; that comes from the pelvic floor or the muscles that surround the vagina. Women can condition these muscles to enhance their own sexual satisfaction. A by-product of this may be enhancing the man's as well.

In doing pelvic exams, the woman is not usually sexually aroused. In fact most hate the process. I notice virtually no difference in the internals but do see a great variation in externals - again associated with weight rather than height. The fitting of diaphragms (no longer common) ends up reflecting age, weight and vaginal births rather than height of the woman. Younger women with no children generally need the smaller sizes whilst older mothers require the larger sizes. Not absolute but not related to height or what you are calling petite.